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Recent studies have demonstrated in leaves of maize (Zea mays L.) plants submitted to a moderate water stress an early enhancement of vacuolar invertase activity that paralleled the expression of the vacuolar invertase Ivr2 gene and the accumulation of hexoses. In this paper, the direct role of abscisic acid (ABA) was checked by providing this hormone to the root medium of hydroponically grown maize...
The histochemical and cytochemical localization of abscisic acid (ABA)-induced H2O2 production in leaves of maize (Zea mays L.) plants were examined, using 3,3-diaminobenzidine (DAB) and CeCl3 staining, respectively, and the relationship between ABA-induced H2O2 production and ABA-induced subcellular activities of antioxidant enzymes was studied. H2O2 generated in response to ABA treatment was detected...
Mitogen-activated protein kinase (MAPK) cascades have been shown to be important components in abscisic acid (ABA) signal transduction pathway. In this study, a 46 kDa MAPK (p46MAPK) induced by ABA was partially purified from maize (Zea mays) by Q-Sepharose FF, Phenyl-Sepharose FF, Resource Q, Mono QTM 5/50 GL, poly-l-lysine-agarose, and Superdex 75 prep-grade columns, and was identified as ZmMAPK5...
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